Frequencies for first 10,000 rows of caseversion variable in demo2017q1 dataset :

     Safety |
     Report |
    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |      3,532       35.32       35.32
          3 |      2,257       22.57       57.89
          4 |      1,491       14.91       72.80
          5 |        994        9.94       82.74
          6 |        628        6.28       89.02
          7 |        497        4.97       93.99
          8 |        351        3.51       97.50
          9 |        250        2.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Sep 2017